$sql .= " GROUP BY ".TB_PREF."stock_master.category_id,
".TB_PREF."stock_category.description,
".TB_PREF."stock_master.stock_id,
$sql .= " GROUP BY ".TB_PREF."stock_master.category_id,
".TB_PREF."stock_category.description,
".TB_PREF."stock_master.stock_id,